Treatment of naphthalene derivatives with iron-carbon micro-electrolysis

• Published in: Transactions of Nonferrous Metals Society of China 2006-12, Vol.16 (6), p.1442-1447
• Main Author: 王玉萍 王连军 彭盘英 陆天虹
• Format: Article
• Language: English
• Subjects: cast; cast iron scrap; iron; micro-electrolysis; naphthalene; scrap; substituent; treatment; wastewater; wastewater treatment
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60035-1

The degradation of five naphthalene derivatives in the simulated wastewater was investigated using the iron-carbon micro-electrolysis method. The optimal initial pH of solution and adsorption of iron-carbon and removal efficiency of the total organic carbon(TOC) were investigated. The results show that the removal efficiency of the naphthalene derivatives can reach 48.9%–92.6% and the removal efficiency of TOC is 42.8%–78.0% for the simulated wastewater with 200 mg/L naphthalene derivatives at optimal pH of 2.0–2.5 after 120 min treatment. The degradation of five naphthalene derivatives with the micro-electrolysis shows the apparent first-order kinetics and the order of removal efficiency of the naphthalene derivatives is sodium 2-naphthalenesulfonate, 2-naphthol, 2, 7-dihydroxynaphthalene, 1-naphthamine, 1-naphthol-8-sulfonic acid in turn. It is illustrated that the substituents of the naphthalene ring can affect the removal efficiency of naphthalene due to their electron-withdrawing or electron-donating ability.